Mr Arobieke, who is the subject of a Sexual Offences Prevention Order (SOPO) banning him from touching muscles, was freed on licence on June 27, 2011 following a 30-month sentence for touching the thigh of a police cadet in Llandudno.

On July 7, Greater Manchester Police (GMP) received a complaint alleging he had breached his SOPO by touching the muscle of a student outside Bolton College three days after his release.

The allegation was forwarded to Mr Arobieke’s “point of contact” at Merseyside Police who alerted the probation service.

The following day the 6ft 5in body building enthusiast was arrested by Merseyside Police and returned to Liverpool Prison.

On August 3 he was interviewed by GMP officers at a Liverpool police station and shown CCTV footage which, according to the letter, “demonstrated that Mr Arobieke had not touched a bicep muscle of any person outside Bolton Community College as alleged in his recall documentation”.

On September 8 he was informed no further action would be taken but, despite this, Mr Arobieke was to remain in jail for nearly a year until a parole board hearing on July 9, 2012 led to his immediate release.

In the Parole Board report, Mr Arobieke admitted speaking to a group of students and asking one if “he did weight training”.

The report goes on to say: “You state that CCTV images viewed in the company of your legal representative provided no evidence of you having touched any of the students outside Bolton College and that following this it had been put to you by a GMP officer that you had ‘mentally’ measured a person’s biceps in contravention of the SOPO.

“The panel concluded from the evidence that your behaviour leading to recall had not increased your levels of risk.”

The report added: “No prosecution followed and no evidence was presented to the panel to indicate the source and nature of the allegation or the reason for discontinuance in spite of a direction for the provision of such information from Merseyside Police.”

Mr Arobieke’s lawyer Joe Ely said the letter was sent to Merseyside chief constable Jon Murphy on September 20 last year.

But a Merseyside Police spokeswoman said: “We can confirm that we have not received a letter from Mr Arobieke or a representative of Mr Arobieke in September. It would be inappropriate for us to comment at this stage.”